Webber R T, del Rio C E, Brady J M, Segall R O
Oral Surg Oral Med Oral Pathol. 1978 Jul;46(1):123-30. doi: 10.1016/0030-4220(78)90446-2.
Endodontic access cavities were prepared in forty extracted human teeth. The access cavities were obturated with Cavit and tested for leakage with methylene blue. The data suggested that at least a 3.5 mm. thickness of Cavit should be used in order to prevent leakage. Examination under the scanning electron microscope showed areas in which the constituents of Cavit were improperly mixed, which may lead to increased penetration.
在40颗拔除的人牙上制备牙髓治疗的开髓洞形。用Cavit封闭开髓洞形，并用亚甲蓝测试其微渗漏情况。数据表明，为防止微渗漏，应使用至少3.5毫米厚的Cavit。扫描电子显微镜检查显示，Cavit的成分混合不当，这可能导致微渗漏增加。
